Subject: Large green caterpillar
Geographic location of the bug: Bangor ME
Time: 06:53 PM EDT
Your letter to the bugman: Found this caterpillar walking across the driveway toward the grass. Having trouble identifying it. Would appreciate your help.
How you want your letter signed: PH
This is the caterpillar of a Modest Sphinx or Poplar Sphinx, Pachysphinx modesta, and we identified on Sphingidae of the Americas where it states: ” These hornworms feed upon poplar, willow, and cottonwood, are very strong and develop to quite a size. Larvae progress very rapidly on poplar. The green of the early hornworm instars is very much like the top of the poplar leaf while the pale green of the final instar more closely resembles the color of the underside of poplar leaves. Larvae are extremely strong with powerful mandibles.” The caudal horn on the Modest Sphinx Caterpillar is quite insignificant compared to the horns of other caterpillars in the family.